256410644130 has 48 divisors (see below), whose sum is σ = 666856774584. Its totient is φ = 68356776960.

The previous prime is 256410644111. The next prime is 256410644137. The reversal of 256410644130 is 31446014652.

256410644130 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 1 + 0 + 644 + 1 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 220449969441 + 35960674689 = 469521^2 + 189633^2 .

It is not an unprimeable number, because it can be changed into a prime (256410644137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83599 + ... + 720978.

Almost surely, 2^256410644130 is an apocalyptic number.

256410644130 is an abundant number, since it is smaller than the sum of its proper divisors (410446130454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256410644130 is a wasteful number, since it uses less digits than its factorization.

256410644130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808131 (or 808128 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 256410644130 its reverse (31446014652), we get a palindrome (287856658782).

The spelling of 256410644130 in words is "two hundred fifty-six billion, four hundred ten million, six hundred forty-four thousand, one hundred thirty".